Home / 20,797.68-31,211.57-8,321.19

Finding the Fourth Proportional to 20,797.68, 31,211.57 and 8,321.19

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Solution

The fourth proportional to 20,797.68, 31,211.57 and 8,321.19 is: 12,487.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.68 : 31,211.57 = 8,321.19 : x
  2. Step 2: Convert to fraction form
    20,797.68/31,211.57 = 8,321.19/x
  3. Step 3: Cross multiply
    20,797.68x = 31,211.57 × 8,321.19
  4. Step 4: Simplify right side
    20,797.68x = 259,717,404.17
  5. Step 5: Solve for x
    x = 259,717,404.17/20,797.68
  6. Step 6: Final answer
    x = 12,487.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.